https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100898
--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Jakub Jelinek <ja...@gcc.gnu.org>: https://gcc.gnu.org/g:d66a703c8ba86f3ca04cc10c3071696e6d014de6 commit r12-1255-gd66a703c8ba86f3ca04cc10c3071696e6d014de6 Author: Jakub Jelinek <ja...@redhat.com> Date: Mon Jun 7 09:25:37 2021 +0200 tree-inline: Fix up __builtin_va_arg_pack handling [PR100898] The following testcase ICEs, because gimple_call_arg_ptr (..., 0) asserts that there is at least one argument, while we were using it even if we didn't copy anything just to get a pointer from/to which the zero arguments should be copied. Fixed by guarding the memcpy calls. Also, the code was calling gimple_call_num_args too many times - 5 times instead of 2, so the patch adds two temporaries for those. 2021-06-07 Jakub Jelinek <ja...@redhat.com> PR middle-end/100898 * tree-inline.c (copy_bb): Only use gimple_call_arg_ptr if memcpy should copy any arguments. Don't call gimple_call_num_args on id->call_stmt or call_stmt more than once. * g++.dg/ext/va-arg-pack-3.C: New test.
